Text preview for : TXM2796HFX-XAA_pt6.pdf part of Samsung TXM2796HFX/XAA 9 file, total of 68 pages for Samsung color television receiver model #'s TXM2796HFX/XAA, TXM2798HFX/XAA, TXM3097WHFXXAA, TXM3296HF6/XAA, TXM3298HFX/XAA, TXM2797HFX/XAA, TXM3096WHFXXAA, TXM3098WHFXXAA & TXM3297HFX/XAA with K55A chassis.
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Troubleshooting
7. Troubleshooting
7-1 No Raster
Abnormal
Check ST-BY
Normal
Abnormal
Check ST5V Q804 "E"
Normal
Check VIN(DC) TS801S PIN 13
Normal
Abnormal
Check ON/OFF IC903 ; 3.3V
Normal
Abnormal
Check ST5V HC801"D809"
Normal
Check MICOM
Check MICOM
Check FA803S
Check FA801S
Normal GND SHORT
Abnormal
Check B+(135V)
Normal
Check F-BOX 5V, 9V
Abnormal
Check9V:R829, IC803 5V:R827, FA802S
Check HC401 J6920 Normal Normal Check Vin(dc)T801S Abnormal Abnormal Check DZ801,DZ802, DZ803,IC804 Check FP801S Check F-BOX I C Check HIC401 Q402 Check H-BLK V-BLK Check F-BOX HD,VD
Check CRT ASSY R529
REPLACE F-BOX
Samsung Electronics
7-1
Troubleshooting
7-2 No Sound
NO SOUND
Normal
Check the signal of CN601 Abnormal
Abnormal
Check SPEAKER and WIRE
Check the input signal of IC602 pins 7,11
Normal
Abnormal
Check the input signal of IC601
Check IC602 B+
Normal Check TUNER B+ and SIF Normal Replace IC602
Abnormal
Check FA803S
Check IC601 B+ Normal Check the signals of pins 47,44,are input Normal Check the signals of pins 25,24 are input Normal Repace IC601
Abnormal
CheckB+(BV) LINE R815, IC805, FA802S
7-2
Samsung Electronics
Troubleshooting
7-3 No Power
Plug in the Power Cord
Check Power LED
ST-BY : LED Nomal
Check the oscillation of X-Tal of IC901 pins 34, 35 Check Reset of IC901 pin 33
Abnomal
Check X901, IC904
Abnomal Nomal
Check IC901 B+ (3.3VDD) Abnomal
Check/Replace IC901 Check I2C Nomal
Check Q804
Abnomal HC801S FA801S FA802S Abnomal Check CN901, CN902
Check IC905 E2PROM
Nomal
Abnomal Check 135V Line
Nomal Check T444S FBT B+ Abnomal Check F-BOX (5V) Nomal Check IC801S, DZ801,DZ802, PC801S,IC804
Abnomal
Check TRANS(12V)
Check IC803, IC802,R827,R829
Nomal
Check the Horizontal TR of HC401 "J6920"
Check F-BOX HD/VD Abnomal
Check F-BOX I C
2
Check HIC401,Q402 Nomal
Check H-BLK, V-BLK Line
Replace F-BOX
Samsung Electronics
7-3
Troubleshooting
7-4 Horizontal Lines Appear
Horizontal lines appear
Nomal
Check IC301 B+ (16V, -13.5V)
Abnomal
Check B+ line and fusible resistance Nomal Check F-BOX B+ VD+, VDAbnomal Check / Replace IC301 Check IC802,IC803, HC801,FA801S,FA803S Abnomal
Replace R424, R425
7-4
Samsung Electronics